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Based on stepped impedance resonator (SIR) and open stub loaded resonator structure, An ultra-wideband(UWB) bandpass filter is presented in this paper. A interdigital coupledline with four open stubs at the end has been used to control parasitic passband, which can ensure the frequencies of parasitic passband be away from the frequencies of ultra-wideband frequency. An X-slot is created to improve...
Based on stepped impedance resonator (SIR) and open stub loaded resonator structure, An ultra-wideband(UWB) bandpass filter is presented in this paper. A interdigital coupledline with four open stubs at the end has been used to control parasitic passband, which can ensure the frequencies of parasitic passband be away from the frequencies of ultra-wideband frequency. An X-slot is created to improve...
We review our recent work on trapped-mode resonances in planar metamaterials and stereometamaterial. The excitation of the Fano-type trapped-mode resonance can be controlled via angles of incidence and polarizations. The stereometamaterial consisting of asymmetrical molecules has an intrinsic chirality and can be used as a multiband polarization spectral filter.
A new kind of hydraulic motor with offset swinging planetary drive of bevel gears and the application in Capstan is presented; the researched of the calculation of the efficiency of the mechanism is made. Compared to the former structure, new kind of structure has many advantages over that of the old structure. The hydraulic driving system in the traditional derrick car is: hydraulic motor drives...
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